nsz Git - libfirm/blob - ir/be/bechordal_main.c

   1 /**
   2  * @file   bechordal_main.c
   3  * @date   29.11.2005
   4  * @author Sebastian Hack
   5  * @cvs-id $Id$
   6  *
   7  * Copyright (C) 2005-2006 Universitaet Karlsruhe
   8  * Released under the GPL
   9  *
  10  * Driver for the chordal register allocator.
  11  */
  12 #ifdef HAVE_CONFIG_H
  13 #include "config.h"
  14 #endif
  15
  16 #include <time.h>
  17
  18 #include "obst.h"
  19 #include "pset.h"
  20 #include "list.h"
  21 #include "bitset.h"
  22 #include "iterator.h"
  23 #include "firm_config.h"
  24
  25 #ifdef WITH_LIBCORE
  26 #include <libcore/lc_opts.h>
  27 #include <libcore/lc_opts_enum.h>
  28 #include <libcore/lc_timing.h>
  29 #endif /* WITH_LIBCORE */
  30
  31 #include "ircons_t.h"
  32 #include "irmode_t.h"
  33 #include "irgraph_t.h"
  34 #include "irprintf_t.h"
  35 #include "irgwalk.h"
  36 #include "ircons.h"
  37 #include "irdump.h"
  38 #include "irdom.h"
  39 #include "ircons.h"
  40 #include "irbitset.h"
  41 #include "irnode.h"
  42 #include "ircons.h"
  43 #include "debug.h"
  44 #include "xmalloc.h"
  45 #include "execfreq.h"
  46
  47 #include "bechordal_t.h"
  48 #include "beabi.h"
  49 #include "bejavacoal.h"
  50 #include "beutil.h"
  51 #include "besched.h"
  52 #include "besched_t.h"
  53 #include "belive_t.h"
  54 #include "bearch.h"
  55 #include "beifg_t.h"
  56 #include "beifg_impl.h"
  57 #include "benode_t.h"
  58 #include "bestatevent.h"
  59 #include "bestat.h"
  60 #include "bemodule.h"
  61
  62 #include "bespillbelady.h"
  63 #include "bespillmorgan.h"
  64 #include "bespillslots.h"
  65 #include "bespilloptions.h"
  66 #include "belower.h"
  67
  68 #ifdef WITH_ILP
  69 #include "bespillremat.h"
  70 #endif /* WITH_ILP */
  71
  72 #include "bejavacoal.h"
  73 #include "becopystat.h"
  74 #include "becopyopt.h"
  75 #include "bessadestr.h"
  76 #include "beverify.h"
  77 #include "benode_t.h"
  78
  79 static be_ra_chordal_opts_t options = {
  80         BE_CH_DUMP_NONE,
  81         BE_CH_LOWER_PERM_SWAP,
  82         BE_CH_VRFY_WARN,
  83 };
  84
  85 /** Enable extreme live range splitting. */
  86 static int be_elr_split = 0;
  87
  88 typedef struct _post_spill_env_t {
  89         be_chordal_env_t cenv;
  90         double           pre_spill_cost;
  91 } post_spill_env_t;
  92
  93 static be_ra_timer_t ra_timer = {
  94         NULL,
  95         NULL,
  96         NULL,
  97         NULL,
  98         NULL,
  99         NULL,
 100         NULL,
 101         NULL,
 102         NULL,
 103         NULL,
 104         NULL,
 105 };
 106
 107 static const lc_opt_enum_int_items_t lower_perm_items[] = {
 108         { "copy", BE_CH_LOWER_PERM_COPY },
 109         { "swap", BE_CH_LOWER_PERM_SWAP },
 110         { NULL, 0 }
 111 };
 112
 113 static const lc_opt_enum_int_items_t lower_perm_stat_items[] = {
 114         { NULL, 0 }
 115 };
 116
 117 static const lc_opt_enum_int_items_t dump_items[] = {
 118         { "spill",      BE_CH_DUMP_SPILL      },
 119         { "live",       BE_CH_DUMP_LIVE       },
 120         { "color",      BE_CH_DUMP_COLOR      },
 121         { "copymin",    BE_CH_DUMP_COPYMIN    },
 122         { "ssadestr",   BE_CH_DUMP_SSADESTR   },
 123         { "tree",       BE_CH_DUMP_TREE_INTV  },
 124         { "constr",     BE_CH_DUMP_CONSTR     },
 125         { "lower",      BE_CH_DUMP_LOWER      },
 126         { "spillslots", BE_CH_DUMP_SPILLSLOTS },
 127         { "appel",      BE_CH_DUMP_APPEL      },
 128         { "all",        BE_CH_DUMP_ALL        },
 129         { NULL, 0 }
 130 };
 131
 132 static const lc_opt_enum_int_items_t be_ch_vrfy_items[] = {
 133         { "off",    BE_CH_VRFY_OFF    },
 134         { "warn",   BE_CH_VRFY_WARN   },
 135         { "assert", BE_CH_VRFY_ASSERT },
 136         { NULL, 0 }
 137 };
 138
 139 static lc_opt_enum_int_var_t lower_perm_var = {
 140         &options.lower_perm_opt, lower_perm_items
 141 };
 142
 143 static lc_opt_enum_int_var_t dump_var = {
 144         &options.dump_flags, dump_items
 145 };
 146
 147 static lc_opt_enum_int_var_t be_ch_vrfy_var = {
 148         &options.vrfy_option, be_ch_vrfy_items
 149 };
 150
 151 static const lc_opt_table_entry_t be_chordal_options[] = {
 152         LC_OPT_ENT_ENUM_PTR ("perm",          "perm lowering options", &lower_perm_var),
 153         LC_OPT_ENT_ENUM_MASK("dump",          "select dump phases", &dump_var),
 154         LC_OPT_ENT_ENUM_PTR ("vrfy",          "verify options", &be_ch_vrfy_var),
 155         LC_OPT_ENT_BOOL     ("elrsplit",      "enable extreme live range splitting", &be_elr_split),
 156         { NULL }
 157 };
 158
 159 static void dump(unsigned mask, ir_graph *irg,
 160                                  const arch_register_class_t *cls,
 161                                  const char *suffix,
 162                                  void (*dump_func)(ir_graph *, const char *))
 163 {
 164         if((options.dump_flags & mask) == mask) {
 165                 if (cls) {
 166                         char buf[256];
 167                         snprintf(buf, sizeof(buf), "-%s%s", cls->name, suffix);
 168                         be_dump(irg, buf, dump_func);
 169                 }
 170                 else
 171                         be_dump(irg, suffix, dump_func);
 172         }
 173 }
 174
 175 /**
 176  * Checks for every reload if it's user can perform the load on itself.
 177  */
 178 static void memory_operand_walker(ir_node *irn, void *env) {
 179         be_chordal_env_t *cenv = env;
 180         const arch_env_t *aenv = cenv->birg->main_env->arch_env;
 181         const ir_edge_t  *edge, *ne;
 182         ir_node          *block;
 183         ir_node          *spill;
 184
 185         if (! be_is_Reload(irn))
 186                 return;
 187
 188         /* only use memory operands, if the reload is only used by 1 node */
 189         if(get_irn_n_edges(irn) > 1)
 190                 return;
 191
 192         spill = be_get_Reload_mem(irn);
 193         block = get_nodes_block(irn);
 194
 195         foreach_out_edge_safe(irn, edge, ne) {
 196                 ir_node *src = get_edge_src_irn(edge);
 197                 int     pos  = get_edge_src_pos(edge);
 198
 199                 assert(src && "outedges broken!");
 200
 201                 if (get_nodes_block(src) == block && arch_possible_memory_operand(aenv, src, pos)) {
 202                         DBG((cenv->dbg, LEVEL_3, "performing memory operand %+F at %+F\n", irn, src));
 203                         arch_perform_memory_operand(aenv, src, spill, pos);
 204                 }
 205         }
 206
 207         /* kill the Reload */
 208         if (get_irn_n_edges(irn) == 0) {
 209                 sched_remove(irn);
 210                 set_irn_n(irn, be_pos_Reload_mem, new_Bad());
 211         }
 212 }
 213
 214 /**
 215  * Starts a walk for memory operands if supported by the backend.
 216  */
 217 static INLINE void check_for_memory_operands(be_chordal_env_t *chordal_env) {
 218         irg_walk_graph(chordal_env->irg, NULL, memory_operand_walker, chordal_env);
 219 }
 220
 221 /**
 222  * Sorry for doing stats again...
 223  */
 224 typedef struct _node_stat_t {
 225         unsigned int n_phis;      /**< Phis of the current register class. */
 226         unsigned int n_mem_phis;  /**< Memory Phis (Phis with spill operands). */
 227         unsigned int n_copies;    /**< Copies */
 228         unsigned int n_perms;     /**< Perms */
 229         unsigned int n_spills;    /**< Spill nodes */
 230         unsigned int n_reloads;   /**< Reloads */
 231 } node_stat_t;
 232
 233 struct node_stat_walker {
 234         node_stat_t *stat;
 235         const be_chordal_env_t *cenv;
 236         bitset_t *mem_phis;
 237 };
 238
 239 static void node_stat_walker(ir_node *irn, void *data)
 240 {
 241         struct node_stat_walker *env = data;
 242         const arch_env_t *aenv       = env->cenv->birg->main_env->arch_env;
 243
 244         if(arch_irn_consider_in_reg_alloc(aenv, env->cenv->cls, irn)) {
 245
 246                 /* if the node is a normal phi */
 247                 if(is_Phi(irn))
 248                         env->stat->n_phis++;
 249
 250                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_spill)
 251                         ++env->stat->n_spills;
 252
 253                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_reload)
 254                         ++env->stat->n_reloads;
 255
 256                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_copy)
 257                         ++env->stat->n_copies;
 258
 259                 else if(arch_irn_classify(aenv, irn) & arch_irn_class_perm)
 260                         ++env->stat->n_perms;
 261         }
 262
 263         /* a mem phi is a PhiM with a mem phi operand or a Spill operand */
 264         else if(is_Phi(irn) && get_irn_mode(irn) == mode_M) {
 265                 int i;
 266
 267                 for(i = get_irn_arity(irn) - 1; i >= 0; --i) {
 268                         ir_node *op = get_irn_n(irn, i);
 269
 270                         if((is_Phi(op) && bitset_contains_irn(env->mem_phis, op)) || (arch_irn_classify(aenv, op) & arch_irn_class_spill)) {
 271                                 bitset_add_irn(env->mem_phis, irn);
 272                                 env->stat->n_mem_phis++;
 273                                 break;
 274                         }
 275                 }
 276         }
 277 }
 278
 279 static void node_stats(const be_chordal_env_t *cenv, node_stat_t *stat)
 280 {
 281         struct node_stat_walker env;
 282
 283         memset(stat, 0, sizeof(stat[0]));
 284         env.cenv     = cenv;
 285         env.mem_phis = bitset_irg_malloc(cenv->irg);
 286         env.stat     = stat;
 287         irg_walk_graph(cenv->irg, NULL, node_stat_walker, &env);
 288         bitset_free(env.mem_phis);
 289 }
 290
 291 static void insn_count_walker(ir_node *irn, void *data)
 292 {
 293         int *cnt = data;
 294
 295         switch(get_irn_opcode(irn)) {
 296         case iro_Proj:
 297         case iro_Phi:
 298         case iro_Start:
 299         case iro_End:
 300                 break;
 301         default:
 302                 (*cnt)++;
 303         }
 304 }
 305
 306 static unsigned int count_insns(ir_graph *irg)
 307 {
 308         int cnt = 0;
 309         irg_walk_graph(irg, insn_count_walker, NULL, &cnt);
 310         return cnt;
 311 }
 312
 313 #ifdef WITH_LIBCORE
 314 /**
 315  * Initialize all timers.
 316  */
 317 static void be_init_timer(be_options_t *main_opts)
 318 {
 319         if (main_opts->timing == BE_TIME_ON) {
 320                 ra_timer.t_prolog     = lc_timer_register("ra_prolog",     "regalloc prolog");
 321                 ra_timer.t_epilog     = lc_timer_register("ra_epilog",     "regalloc epilog");
 322                 ra_timer.t_live       = lc_timer_register("ra_liveness",   "be liveness");
 323                 ra_timer.t_spill      = lc_timer_register("ra_spill",      "spiller");
 324                 ra_timer.t_spillslots = lc_timer_register("ra_spillslots", "spillslots");
 325                 ra_timer.t_color      = lc_timer_register("ra_color",      "graph coloring");
 326                 ra_timer.t_ifg        = lc_timer_register("ra_ifg",        "interference graph");
 327                 ra_timer.t_copymin    = lc_timer_register("ra_copymin",    "copy minimization");
 328                 ra_timer.t_ssa        = lc_timer_register("ra_ssadestr",   "ssa destruction");
 329                 ra_timer.t_verify     = lc_timer_register("ra_verify",     "graph verification");
 330                 ra_timer.t_other      = lc_timer_register("ra_other",      "other time");
 331
 332                 LC_STOP_AND_RESET_TIMER(ra_timer.t_prolog);
 333                 LC_STOP_AND_RESET_TIMER(ra_timer.t_epilog);
 334                 LC_STOP_AND_RESET_TIMER(ra_timer.t_live);
 335                 LC_STOP_AND_RESET_TIMER(ra_timer.t_spill);
 336                 LC_STOP_AND_RESET_TIMER(ra_timer.t_spillslots);
 337                 LC_STOP_AND_RESET_TIMER(ra_timer.t_color);
 338                 LC_STOP_AND_RESET_TIMER(ra_timer.t_ifg);
 339                 LC_STOP_AND_RESET_TIMER(ra_timer.t_copymin);
 340                 LC_STOP_AND_RESET_TIMER(ra_timer.t_ssa);
 341                 LC_STOP_AND_RESET_TIMER(ra_timer.t_verify);
 342                 LC_STOP_AND_RESET_TIMER(ra_timer.t_other);
 343         }
 344 }
 345
 346 #define BE_TIMER_INIT(main_opts)        be_init_timer(main_opts)
 347
 348 #define BE_TIMER_PUSH(timer)                                                            \
 349         if (main_opts->timing == BE_TIME_ON) {                                              \
 350                 if (! lc_timer_push(timer)) {                                                   \
 351                         if (options.vrfy_option == BE_CH_VRFY_ASSERT)                               \
 352                                 assert(!"Timer already on stack, cannot be pushed twice.");             \
 353                         else if (options.vrfy_option == BE_CH_VRFY_WARN)                            \
 354                                 fprintf(stderr, "Timer %s already on stack, cannot be pushed twice.\n", \
 355                                         lc_timer_get_name(timer));                                          \
 356                 }                                                                               \
 357         }
 358 #define BE_TIMER_POP(timer)                                                                    \
 359         if (main_opts->timing == BE_TIME_ON) {                                                     \
 360                 lc_timer_t *tmp = lc_timer_pop();                                                      \
 361                 if (options.vrfy_option == BE_CH_VRFY_ASSERT)                                          \
 362                         assert(tmp == timer && "Attempt to pop wrong timer.");                             \
 363                 else if (options.vrfy_option == BE_CH_VRFY_WARN && tmp != timer)                       \
 364                         fprintf(stderr, "Attempt to pop wrong timer. %s is on stack, trying to pop %s.\n", \
 365                                 lc_timer_get_name(tmp), lc_timer_get_name(timer));                             \
 366                 timer = tmp;                                                                           \
 367         }
 368 #else
 369
 370 #define BE_TIMER_INIT(main_opts)
 371 #define BE_TIMER_PUSH(timer)
 372 #define BE_TIMER_POP(timer)
 373
 374 #endif /* WITH_LIBCORE */
 375
 376 /**
 377  * Perform things which need to be done per register class before spilling.
 378  */
 379 static void pre_spill(const arch_isa_t *isa, int cls_idx, post_spill_env_t *pse) {
 380         be_chordal_env_t *chordal_env = &pse->cenv;
 381         node_stat_t      node_stat;
 382
 383         chordal_env->cls           = arch_isa_get_reg_class(isa, cls_idx);
 384         chordal_env->border_heads  = pmap_create();
 385         chordal_env->ignore_colors = bitset_malloc(chordal_env->cls->n_regs);
 386
 387 #ifdef FIRM_STATISTICS
 388         if (be_stat_ev_is_active()) {
 389                 be_stat_tags[STAT_TAG_CLS] = chordal_env->cls->name;
 390                 be_stat_ev_push(be_stat_tags, STAT_TAG_LAST, be_stat_file);
 391
 392                 /* perform some node statistics. */
 393                 node_stats(chordal_env, &node_stat);
 394                 be_stat_ev("phis_before_spill", node_stat.n_phis);
 395         }
 396 #endif /* FIRM_STATISTICS */
 397
 398         /* put all ignore registers into the ignore register set. */
 399         be_put_ignore_regs(chordal_env->birg, chordal_env->cls, chordal_env->ignore_colors);
 400
 401         be_pre_spill_prepare_constr(chordal_env);
 402         dump(BE_CH_DUMP_CONSTR, chordal_env->irg, chordal_env->cls, "-constr-pre", dump_ir_block_graph_sched);
 403
 404 #ifdef FIRM_STATISTICS
 405         if (be_stat_ev_is_active()) {
 406                 pse->pre_spill_cost = be_estimate_irg_costs(chordal_env->irg,
 407                         chordal_env->birg->main_env->arch_env, chordal_env->birg->exec_freq);
 408         }
 409 #endif /* FIRM_STATISTICS */
 410 }
 411
 412 /**
 413  * Perform things which need to be done per register class after spilling.
 414  */
 415 static void post_spill(post_spill_env_t *pse) {
 416         be_chordal_env_t    *chordal_env = &pse->cenv;
 417         ir_graph            *irg         = chordal_env->irg;
 418         be_irg_t            *birg        = chordal_env->birg;
 419         const be_main_env_t *main_env    = birg->main_env;
 420         be_options_t        *main_opts   = main_env->options;
 421         static int          splitted     = 0;
 422         node_stat_t         node_stat;
 423
 424 #ifdef FIRM_STATISTICS
 425         if (be_stat_ev_is_active()) {
 426                 double spillcosts = be_estimate_irg_costs(irg, main_env->arch_env, birg->exec_freq) - pse->pre_spill_cost;
 427
 428                 be_stat_ev_l("spillcosts", (long) spillcosts);
 429
 430                 node_stats(chordal_env, &node_stat);
 431                 be_stat_ev("phis_after_spill", node_stat.n_phis);
 432                 be_stat_ev("mem_phis", node_stat.n_mem_phis);
 433                 be_stat_ev("reloads", node_stat.n_reloads);
 434                 be_stat_ev("spills", node_stat.n_spills);
 435         }
 436 #endif /* FIRM_STATISTICS */
 437
 438         check_for_memory_operands(chordal_env);
 439
 440         be_abi_fix_stack_nodes(birg->abi, birg->lv);
 441
 442         BE_TIMER_PUSH(ra_timer.t_verify);
 443
 444         /* verify schedule and register pressure */
 445         if (chordal_env->opts->vrfy_option == BE_CH_VRFY_WARN) {
 446                 be_verify_schedule(irg);
 447                 be_verify_register_pressure(chordal_env->birg, chordal_env->cls, irg);
 448         }
 449         else if (chordal_env->opts->vrfy_option == BE_CH_VRFY_ASSERT) {
 450                 assert(be_verify_schedule(irg) && "Schedule verification failed");
 451                 assert(be_verify_register_pressure(chordal_env->birg, chordal_env->cls, irg)
 452                         && "Register pressure verification failed");
 453         }
 454         BE_TIMER_POP(ra_timer.t_verify);
 455
 456         if (be_elr_split && ! splitted) {
 457                 extreme_liverange_splitting(chordal_env);
 458                 splitted = 1;
 459         }
 460
 461         /* Color the graph. */
 462         BE_TIMER_PUSH(ra_timer.t_color);
 463         be_ra_chordal_color(chordal_env);
 464         BE_TIMER_POP(ra_timer.t_color);
 465
 466         dump(BE_CH_DUMP_CONSTR, irg, chordal_env->cls, "-color", dump_ir_block_graph_sched);
 467
 468         /* Create the ifg with the selected flavor */
 469         BE_TIMER_PUSH(ra_timer.t_ifg);
 470         chordal_env->ifg = be_create_ifg(chordal_env);
 471         BE_TIMER_POP(ra_timer.t_ifg);
 472
 473 #ifdef FIRM_STATISTICS
 474         if (be_stat_ev_is_active()) {
 475                 be_ifg_stat_t stat;
 476                 be_ifg_stat(chordal_env, &stat);
 477                 be_stat_ev("ifg_nodes", stat.n_nodes);
 478                 be_stat_ev("ifg_edges", stat.n_edges);
 479                 be_stat_ev("ifg_comps", stat.n_comps);
 480
 481                 node_stats(chordal_env, &node_stat);
 482                 be_stat_ev("perms_before_coal", node_stat.n_perms);
 483                 be_stat_ev("copies_before_coal", node_stat.n_copies);
 484         }
 485 #endif /* FIRM_STATISTICS */
 486
 487         /* copy minimization */
 488         BE_TIMER_PUSH(ra_timer.t_copymin);
 489         co_driver(chordal_env);
 490         BE_TIMER_POP(ra_timer.t_copymin);
 491
 492         dump(BE_CH_DUMP_COPYMIN, irg, chordal_env->cls, "-copymin", dump_ir_block_graph_sched);
 493
 494         BE_TIMER_PUSH(ra_timer.t_ssa);
 495
 496         /* ssa destruction */
 497         be_ssa_destruction(chordal_env);
 498
 499         BE_TIMER_POP(ra_timer.t_ssa);
 500
 501         dump(BE_CH_DUMP_SSADESTR, irg, chordal_env->cls, "-ssadestr", dump_ir_block_graph_sched);
 502
 503         BE_TIMER_PUSH(ra_timer.t_verify);
 504         if (chordal_env->opts->vrfy_option != BE_CH_VRFY_OFF) {
 505                 be_ssa_destruction_check(chordal_env);
 506         }
 507         BE_TIMER_POP(ra_timer.t_verify);
 508
 509         be_ifg_free(chordal_env->ifg);
 510         pmap_destroy(chordal_env->border_heads);
 511         bitset_free(chordal_env->ignore_colors);
 512
 513 #ifdef FIRM_STATISTICS
 514         if (be_stat_ev_is_active()) {
 515                 node_stats(chordal_env, &node_stat);
 516                 be_stat_ev("perms_after_coal", node_stat.n_perms);
 517                 be_stat_ev("copies_after_coal", node_stat.n_copies);
 518                 be_stat_ev_pop();
 519         }
 520 #endif /* FIRM_STATISTICS */
 521 }
 522
 523 /**
 524  * Performs chordal register allocation for each register class on given irg.
 525  *
 526  * @param birg  Backend irg object
 527  * @return Structure containing timer for the single phases or NULL if no timing requested.
 528  */
 529 static void be_ra_chordal_main(be_irg_t *birg)
 530 {
 531         const be_main_env_t *main_env  = birg->main_env;
 532         const arch_isa_t    *isa       = arch_env_get_isa(main_env->arch_env);
 533         ir_graph            *irg       = birg->irg;
 534         be_options_t        *main_opts = main_env->options;
 535         int                 j, m;
 536         be_chordal_env_t    chordal_env;
 537
 538         BE_TIMER_INIT(main_opts);
 539         BE_TIMER_PUSH(ra_timer.t_other);
 540         BE_TIMER_PUSH(ra_timer.t_prolog);
 541
 542         be_assure_dom_front(birg);
 543         be_assure_liveness(birg);
 544
 545         chordal_env.opts      = &options;
 546         chordal_env.irg       = irg;
 547         chordal_env.birg      = birg;
 548         FIRM_DBG_REGISTER(chordal_env.dbg, "firm.be.chordal");
 549
 550         obstack_init(&chordal_env.obst);
 551
 552         BE_TIMER_POP(ra_timer.t_prolog);
 553
 554         be_stat_ev("insns_before", count_insns(irg));
 555
 556         if (! arch_code_generator_has_spiller(birg->cg)) {
 557                 /* use one of the generic spiller */
 558
 559                 /* Perform the following for each register class. */
 560                 for (j = 0, m = arch_isa_get_n_reg_class(isa); j < m; ++j) {
 561                         post_spill_env_t pse;
 562
 563                         memcpy(&pse.cenv, &chordal_env, sizeof(chordal_env));
 564                         pre_spill(isa, j, &pse);
 565
 566                         BE_TIMER_PUSH(ra_timer.t_spill);
 567                         be_do_spill(&pse.cenv);
 568                         BE_TIMER_POP(ra_timer.t_spill);
 569
 570                         dump(BE_CH_DUMP_SPILL, irg, pse.cenv.cls, "-spill", dump_ir_block_graph_sched);
 571
 572                         post_spill(&pse);
 573                 }
 574         }
 575         else {
 576                 post_spill_env_t *pse;
 577
 578                 /* the backend has it's own spiller */
 579                 m = arch_isa_get_n_reg_class(isa);
 580
 581                 pse = alloca(m * sizeof(pse[0]));
 582
 583                 for (j = 0; j < m; ++j) {
 584                         memcpy(&pse[j].cenv, &chordal_env, sizeof(chordal_env));
 585                         pre_spill(isa, j, &pse[j]);
 586                 }
 587
 588                 BE_TIMER_PUSH(ra_timer.t_spill);
 589                 arch_code_generator_spill(birg->cg, &chordal_env);
 590                 BE_TIMER_POP(ra_timer.t_spill);
 591                 dump(BE_CH_DUMP_SPILL, irg, NULL, "-spill", dump_ir_block_graph_sched);
 592
 593                 for (j = 0; j < m; ++j) {
 594                         post_spill(&pse[j]);
 595                 }
 596         }
 597
 598         BE_TIMER_PUSH(ra_timer.t_spillslots);
 599
 600         be_coalesce_spillslots(&chordal_env);
 601         dump(BE_CH_DUMP_SPILLSLOTS, irg, NULL, "-spillslots", dump_ir_block_graph_sched);
 602
 603         BE_TIMER_POP(ra_timer.t_spillslots);
 604
 605         BE_TIMER_PUSH(ra_timer.t_verify);
 606         /* verify spillslots */
 607         if (options.vrfy_option == BE_CH_VRFY_WARN) {
 608                 be_verify_spillslots(main_env->arch_env, irg);
 609         }
 610         else if (options.vrfy_option == BE_CH_VRFY_ASSERT) {
 611                 assert(be_verify_spillslots(main_env->arch_env, irg) && "Spillslot verification failed");
 612         }
 613         BE_TIMER_POP(ra_timer.t_verify);
 614
 615         BE_TIMER_PUSH(ra_timer.t_epilog);
 616         dump(BE_CH_DUMP_LOWER, irg, NULL, "-spilloff", dump_ir_block_graph_sched);
 617
 618         lower_nodes_after_ra(birg, options.lower_perm_opt & BE_CH_LOWER_PERM_COPY ? 1 : 0);
 619         dump(BE_CH_DUMP_LOWER, irg, NULL, "-belower-after-ra", dump_ir_block_graph_sched);
 620
 621         obstack_free(&chordal_env.obst, NULL);
 622         BE_TIMER_POP(ra_timer.t_epilog);
 623
 624         BE_TIMER_POP(ra_timer.t_other);
 625
 626         be_stat_ev("insns_after", count_insns(irg));
 627
 628         return;
 629 }
 630
 631 static be_ra_t be_ra_chordal_allocator = {
 632         be_ra_chordal_main,
 633 };
 634
 635 void be_init_chordal(void)
 636 {
 637         lc_opt_entry_t *be_grp = lc_opt_get_grp(firm_opt_get_root(), "be");
 638         lc_opt_entry_t *ra_grp = lc_opt_get_grp(be_grp, "ra");
 639         lc_opt_entry_t *chordal_grp = lc_opt_get_grp(ra_grp, "chordal");
 640
 641         lc_opt_add_table(chordal_grp, be_chordal_options);
 642
 643         be_register_allocator("chordal", &be_ra_chordal_allocator);
 644 }
 645
 646 BE_REGISTER_MODULE_CONSTRUCTOR(be_init_chordal);